Seat springs are 8 or 9 gauge (the smaller the number , the heavier the spring) and back springs are 11 or 12 gauge. If you are buying springs cut to length, they should already be "D" ended so they don't slip out of the clips. You also need to connect the springs together with a tie wire (oil impregnated wire wrapped tightly with kraft paper) so they don't spread apart when you sit on them.
You need SS clips to hold the springs in place, and BW clips to hold the tie wire to the springs. The tie wire should be attached under the springs, not on top. Check out this thread:CLICK HERE Also check out this thread: CLICK HERE

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I got my Auvecos and Komatex boards today. What is the alignment between the hole in the komatex and the hole in the metal? The clip is offset and it seems the hole in the metal aligns to the edge of the hole in the Komatex...

The thin flat piece is just a border and can be replaced with a piece of 8 gauge round border wire. With the odd shape of the seat springs, you may have to bend these springs yourself from 8 gauge wire to match what you have, or look for a donor car to get solid springs from. Here's a thread that might help you: CLICK HERE This is the perfect example of why the springs should be connected together from side to side across the middle to form one unit. If they had been connected from the beginning, you probably wouldn't have as much damage as you do.

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Dan...why couldn't I use zig zag springs that are a little different as long as I match the bend of the existing springs. I'm thinking anything I bend won't be exact anyways so I might as well use what's available. Or maybe pull all the springs on one side and have those all match or even redo them all.

What you are going to find is that any springs you come up with will be radically different. You have the benefit of only having to match larger square bends which would be easier to duplicate, and there are only about three of them to do. These could be bent reasonably accurately on a small vise. The front seat back only has a broken kicker spring which wouldn't be hard to duplicate either.

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